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The establishment of EVISA is funded by the EU through the Fifth Framework Programme (G7RT- CT- 2002- 05112).

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Chelation involves coordination of more than one sigma-electron pair donor group from the same ligand to the same central atom. The number of coordinating groups in a single chelating ligand is indicated by the adjectives didentate, tridentate, tetradentate, etc..

The term "chelation" was found in the following pages:


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